First, Welcome abord.
Of the over-the-counter rifles out there, the T3 is hard to beat. I have one in 270 Win. My rifle, with its' perferred handload shoots 1/2 moa 3 shot groups from a cold barrel. I use a 300 yd zero. With the tools listed below, I would not hesitate to use my T-3 Lite 270 Win out to 750 yds on a mule deer. For an Elk, I would stop at 450 yds.
Look seriously at the 150gr boattail loads for your rifle. I am not sure that your barrel's twist rate will stablize the hyper low drag Wildcat 195 gr VLD's that the guys are shooting in thier 270 AM's.
The first thing I would do is go get a Harris bipod. In order to take down a critter at long range you must become one with the dirt. The swivle head bipod and a pod lock is the go-to setup.
Then I would get a copy of EXBAL ballistics software, the highest quality range finder you can afford, and a Kestrel
. The other thing I recomend is the outstanding video that Shawn Carlock of Defensive Edge offers for sale on his web site. It saved me from making some "bad choices."